steven steven gately went online at the design build firm. >> give them an idea what you liked, disliked and it made that design process, it gave the designers a sense of who we are and what we're looking for in terms of the new space. >> reporter: g on to house, a web site that's grown into a remodelling marketplace valued at over $2 billion. >> i think that the fact that the vendors were there, the homeowners ready to do that and they really wanted the house to become the place where they do everything. >> i view it as an added cost of doing business. >> reporte remodelling web sites not just a destination for homeowners but necessity for remodelling professionals. >> most of us got into this because we love the smell of sawdust, passion about homes and now we have to be experts in social media and all these other platforms. >> r t competition is growing fast. take for example seattle-based porch.com, a company that connects homeowners with home improvement professionals. they started in this space just over a year ago with barely 100 workers. they're busting out, literally taking on 7